GENTLE USD Inline Reducer Union｜Quick Tube Size Adapter

• Different-Diameter Connection: One-piece union links tubes of different sizes instantly, avoiding downtime from size mismatches.
• Solves On-Site Problems: The USD series is the best solution for tube size conversion. For example, when connecting a 10 mm tube to an 8 mm pneumatic device, no extra adapters are required — a single USD coupler completes the job quickly and reliably.
• Tool-Free Push-In: Push-to-connect design allows installation and removal without tools, significantly reducing maintenance and production downtime.
• Durable Leak-Proof Seal: Built-in O-ring and metal lock-claw collet ensure airtight performance, preventing tube slippage under vibration or pull.
• Taiwan-Made & Dual Colors: Available in black and gray-white (-GW), durable and reliable for long-term industrial use.
• Applications: Widely used in automation lines, electronics assembly, semiconductor equipment, precision instruments, and robotic arms. USD couplers enable fast tube replacement or system upgrades, minimizing downtime and ensuring continuous production.

Q1: What are the main applications of the USD series?
A: Ideal for size conversion, tube extension, and emergency repair. For instance, when connecting a larger main air line to a smaller equipment port, USD unions provide an immediate solution without needing separate adapters.

Q2: Do they require tools for installation?
A: No. With the push-to-connect structure, simply cut the tube ends flat and insert. For removal, press the release ring evenly to disengage the lock claws.

Q3: What is the operating range?
A: Rated for 0–0.9 MPa pressure and 5–60 °C temperature, suitable for most industrial pneumatic systems.

Q4: Which tube types are supported?
A: Fully compatible with PU and nylon tubing, covering 4–12 mm sizes.

Q5: Are they reusable?
A: Yes. Equipped with O-rings and metal lock-claw collets, USD couplers maintain airtightness even after multiple assembly cycles.

Q6: In which industries are they most common?
A: Frequently applied in automation lines, semiconductor facilities, precision testing equipment, and robotic arms. During equipment upgrades or maintenance, USD unions enable quick diameter conversion, minimizing downtime.